The ``solidification`` of grain boundaries with increasing temperature
Conference
·
OSTI ID:94074
- Polish Academy of Sciences, Warsaw (Poland). High Pressure Research Center
The aim of the paper is to explain the recently observed de-wetting grain boundary transition with increasing temperature. On the example of a bicrystal from the Fe-6at.%Si alloy, it was found recently that as temperature is increased, the following GB transitions take place: ``solid`` (or regular) GB {yields} ``premelted`` GB {yields} ``solid`` GB. At the same time the wetting/de-wetting transitions have taken place. Another example of such GB behavior wa discovered during sintering of alumina. The inverse melting behavior is explained as follows: low melting point impurities cause GB premelting at low temperatures. However de-segregation of impurities at high temperatures causes return of the GB structure to its regular ``solid`` state.
- OSTI ID:
- 94074
- Report Number(s):
- CONF-941144--; ISBN 1-55899-258-8
- Country of Publication:
- United States
- Language:
- English
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